Mark - IN.
Well-known Member
I was reading the post below about the C carb idle adjustment. Same carb as the B? Reason I ask, my B quit running a week ago minutes after changing the belt on my Woods belly mower so I could mow the lawn. Dumb luck. It was a fuel issue. Specifically a carb issue. I have it running now, and seems to be running pretty good. I took the carb off, cleaned the outside, backed the mixture screw all the way out, and it was 7.5 turns from start to out. There's a plug down near the bottom of the bowl that when I took it out and looked inside, looks like a jet. Anyway, I did not take the carb apart, but dunked it, swished it, turned upside down, lifted, drained, etc for about a half hour in carb/parts cleaner and cleaned a lot of years built up gunk out. Carb is actually clean now inside as near as I can tell, and definately outside. Then I dunked it in gasoline swished, twisted, flipped, emptied a few times to get the cleaner and any silt out. I put the mixture screw back in, 7.5 turns from start. Then for the heck of it, I ran it all the way to seat. Was .75 turn, so I backed it out .75 turn. Tractor runs, appears to run ok. I can and will play with the mixture, but my question is...is there a typical starting point on the mixture screw? .75 turn would seem a little lean to me, but maybe not on this carb, or model carb. I searched the archives, and the only two posts that I saw on the B carb basically suggested playing with the mixture. Sure, I will tune the mixture, but I'm wondering if there is a rule of thumb as a starting point on mixture for the B carb? It's running and appears to be pretty good, but I have some tuning to do.
Thanks in advance.
Mark
Thanks in advance.
Mark